First watt j2 vs aleph j. 03-15-2017, 10:03 PM.

First watt j2 vs aleph j For those of you who didn't know these two bands, i north can invite you to have a look. massimo. While the Aleph I think you may be confusing the Firstwatt J2 with the Aleph J. First Watt SIT-4 Power Amplifier (moon-audio. celo Weston, FL United States Dick Olsher famously remarked that “The first watt is the most important watt. Joined 2014. 25 Pass Labs - XA. youtube talks with Nelson Pass. Still like seeing talk of the J2, I may upgrade someday. rs/ Paid Member. Many months ago before ordering the BJ2 boards, I read a long post by Generg when looking at learning how to look at gain. Discussion in 'Audio Hardware' started by Kimo, Jan 23, 2011. Watt's New? 24/10/2023 Nice to hear I have a FirstWatt j2. 5v to reach rated output and I initially Used a passive First Watt B1 because my CD players output was 2v, but didn’t quite cut it with my turntable preamp output. . The topology bears a resemblance to the Post subject: Re: First Watt F6, Aleph J, F5 Turbo, M2, VFETand etc. AND FWIW built with Antek 500VA transformer. Joined: Sep 7, 2017 Likes Received: 987 Trophy So far, I plan to use dual input JFETs on the input stage. I run a Pre with Tubes, so the XA 25 or the 30 watt version looks like a real possibility. Thread starter Blues; Start date 2009-09 assuming that amp is nothing else than augmented Aleph J input stage , with SRPP output stage - matching of output jfets between channels isn't necessary , and even matching of two output jfets in one channel isn't so critical Does this mean that the J2 will be Nelson is first releasing a new Vfet kit via the diyaudio store. For the money, I like the XA-30. First Prev 20 of 111 Go to page. I, too, am into mutli-channel. However, if I drop bi-amping and just run the J2 through the F4, then I get better results. 00: CA Sep 24, 2022: 4 : FOR SALE: First Watt J2: Solid State Amplifiers: $2350. 1 of 2 Go to page. Later on Nelson says he has plans to release higher power designs based on these larger Tonkin units. Item #650168001. Still Of the 25 watt First Watt amps, M2 and Aleph J are current faves. 00: CT Nov 07, 2022: 5 : FOR SALE: First Watt F7 Stereo Power Amplifier: Solid State Amplifiers: $2100. Single-ended Class A, the Aleph J is an easy-going design which is happy driving 8 ohm loads with a warm, relaxed presentation. Ths is the best, and most flexible, First Watt amp I've had--to include the F3, F4, F5, J2, and an Aleph J clone. Just looking for more input. ” This sentiment has also been expressed by others as “Who cares what an amplifier sounds like at 500 watts if it sounds like crap at one watt?” The J2 and M2 continue to push the envelope in unique ways. Maybe dual on the input stage CCS JFETs too. Sources – CD Players, external DAC’s, Turntables, Streaming. two bjt CCS in Babelfish J is superior to led-bjt CCS in Aleph J , but you can't hear the difference . Go to comments. While I have not had the opportunity to listen to the J2, I have it in my sights as to the next First Watt amp to First Prev 100 of 111 Go to page. 00. The J2's sound MUCH better, to me, than any Pass amps. First watt f5 vs aleph j SUBMITTED BY: Guest. This approach was chosen because the JFETs can take better So far, I plan to use dual input JFETs on the input stage. I was considering upgrading the transformer to two - both uprated Va, with interwinding screens and wound for 240VAC, rather than 230VAC, but since the existing transformer isn't causing any problems, potential gains are so small, Built F5, F5T, F6, Aleph J, J2, Sony VFET, M2 and few preamps including BA3 and JBOZ. With 50 stereo watts, low output impedance and feedback, the F5 appears to move away from the FirstWatt center focus and toward the periphery. First Watt F5 vs Aleph 5 . Thread starter Rony1; Start date 2010-02-16 4:35 am; Status Not open for further replies. Queens makes an extra effort to promote diversity and culture by involving its students in multiple, wonderful extracurricular activities. J2 ; When soldering any components, use enough solder to fill the hole and most of the copper pad. Of course, I love and will keep my J2 as well I think you may be confusing the Firstwatt J2 with the Aleph J. This suggest that the bias current is about 1. Prior to the LTA I had a Pass Aleph P preamp which sounded flat compared to the LTA, Mar 6, 2021 · The Aleph J I have though like others mentioned runs 25 watts at 8 ohms it dips to 14 watts into 4 ohms. using only 1 p-channel, compared to the standard Aleph-J. Except that J2 does not used a Aleph current source, or else we might just drop the JFET into AX PCB. Classified: FOR SALE - First Watt Aleph J DIY *great build and condition asking for $745. Has anyone compared the J2 and Aleph 30? Would anyone have any experience comparing the sound of the J to the J2? I have the J & I'm considering purchasing the J2. The R100A is perfectly fine for our intended application. It seems most audiophiles enter the hobby already well upward from the bottom steps of power by using either a receiver with at least 100Wpc or separates at the same, or higher, specification. Thanks for your help. And an X150. Denon POA-1001. To put it briefly, just build the Aleph J, don't look back and stop reading. First Watt - J2 (Jeff Young) Aleph J First Watt - Aleph J (Clone by Frank) First Watt / General Amplifier / Pass Labs / Passworks / PassDIY / Nelson Pass : F7 First Watt - F7 : First Watt / General Amplifier / Pass Labs / Passworks / PassDIY / Nelson Pass: XA. In the 1970s, his first venture, Threshold, broke new ground in solid-state designs, and he’s still advancing the state-of-the-art. Nelson Pass. Jump to Latest elwood625. Report. Zen Mod. Amps – Single-ended triode vacuum tube designs, push-pull amplifiers and even solid state amps with the latest designs in digital. If you have efficient First stage is similar to aleph J, except that the CCS is a J-fet. (There were also the Aleph 0 and Aleph 1, but they technically had three gain stages and so were a bit different from the others, more like Dec 12, 2021 · Having semisouth on hand but no 2sj74 I am thinking to build a J2 with mosfet input like aleph M alpeh 3 etc Is this feasible and what would-i leave on the table soundwise compared to a real J2 ? Zen Mod. 5V rails I can get the J2 to swing 52V, which drives the F4 to a nice 80W Class A. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk FOR SALE: First Watt J2 Watch Report This Ad. 5 from a friend, recently. EXPIRED - WANTED: Pass Labs Aleph/First Watt J/J2 . Has a balanced sound signature and extreme resolution typical of a Pass design. 1; 2; 3; Next. Running both the J2 and F4 at 28. Someone asked what the J2 replaced in my system. I've had the First Watt J2, M2, and Pass Labs X150. And there is more to come. Hi, my name is Kevin and I’m a hoarder. Like my Aleph 3 of yesteryear, Nelson's First Watt F8 is a low-powered two-stage single-ended Class A stereo amplifier, and is offered in that same spirit of affordable excellence at $4000 USD, which is within a few dollars of being the same price in inflation corrected dollars that I paid for my Aleph 3 back in 1997. I'm intrigued from what I've read about his design philosophy in development of his First Watt line of amps. The First Watt Aleph J is a high-performance integrated amplifier designed by renowned audio engineer Nelson Pass. But the simplified schematic of Firstwatt J2 shown just a basic circuit of SRPP(Shunt Regulate Push-Pull). The Aleph J has slightly better defined bass and slightly more extended highs, while the MC240 has that bloom offering a bit more presence. Posted: Sat Oct 30, 2021 4:06 pm . I owned the J (twice!) and sold them, since ultimately I still prefer my tube amps, but something keeps me interested in having an SS in the mix. Overall, one of the most popular pieces. 1 v - Vbe) / 1K flowing through R8. While the First Watt J2 is still in production with no official circuit published, an excellent solution was designed by diyaudio member EVUL based on I love mine. Also use BA3 preamp extensively. Retail Price: USD $3995. Has anyone heard either of these two amps? I have read the reviews on Sixmoons, but am curious as to the opinions of any forum members. Otherwise very similar to an Aleph 3 or J or the BA gain stage. Aleph J Manual - First Watt. But the distortion figures suggest clearly that the core of the credo -- the ability to track I have ordered a pair of mono balanced Pass Aleph 3 clone amps from here I know a took a big risk by doing so but since that is the only way to First Watt J2 (Horn Amp) Electronics mounted in Middle Atlantic BRK20 rack DIY speakers: RSS390HF-4 Woofer, 4 x SEAS W18E-001 Mids in MTM with TAD TD-2002 on Altec 511 horn Monoprice The Aleph 3 sounded horrid on Thiel 2. my favorite amps ever with appropriate speakers. Make sure your speakers are efficient before purchasing the F6. those J and J2s really are easy loads for tube preamps, which is a must for me if I'm using a SS amp. Pass subsequently invited hobbyists to build their own, contributing With the review of the First Watt J2 JFET Amplifier and B1 Buffer Amp, it is time to descend. The most important topological difference is that the output stage current source is no longer an “Aleph” current source, but a version of the classic “Mu Follower”. J2: A more relaxed version of the F5. Joined 2007. 5 (valves) Amplifier: FirstWatt F5, FirstWatt F4 Speakers: ASI Tango R, Yamamoto YS-500 [on review], Rethm Saadhana, Zu Essence Cables: Complete loom of ASI Liveline I finally pony up for a First Watt J2 for my Susvara and the same week Good Old Nelson announces the F8. Thread assuming that amp is nothing else than augmented Aleph J input stage , with SRPP output stage - matching of output jfets between channels isn't necessary , and even matching of two output jfets in one channel isn't so critical but - as I wrote there - ask Papa directly ; his answer will save you at least 50% of matching efforts Nelson literally assembles each of these amplifiers himself under the First Watt name. The Aleph J was my first build using the DiyAudio boards. The First Watt Aleph J is a direct descendant of the Volksamp Aleph 30, itself a descendant of the Pass Labs Aleph 3. Still want to build 2 more, as balanced mono block at around 100 watts per channel or Here is the simplified schematic of the J2. I would not recommend using it with speakers under 90db. First Watt is a Nelson Pass enterprise, and he’s the founder and CEO of Pass Laboratories. Also, if anyone has compared the First Watt amps and preamps to the Pass Labs amps and preamps, I have owned the Aleph J and XA30. F3. When I began, I wasn't sure if clone design would even work. Jump to Latest V. I've owned the Aleph 3, 30, 60s, and 2s. FOR SALE: VPI HW-40 Footers - HW40 4 feet with turntable isolation bolts, washers and foam donuts The Aleph 30 uses BJT's and one of the major improvements of the Aleph J are j-fets for the front end. First is the input stage, which uses a closely matched pair of Linear Systems LSJ74 or Toshiba 2SJ74 JFET transistors. Submit a review or share your experience – we’re always looking for Pass First Watt J2 vs F3. in. Official Court Jester. Info: First Watt J2 Asking Price: USD $ 1950. The good part of an X to me is that you make full use of the other half side P-JFET (j109, j74) LTP, especially in a design like J2, which you need to parallel the input-stage JFET but not the output-stage one! Last edited: 2010-02-09 5:51 pm. Audio Alchemy OM-90. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk Nice to hear I have a FirstWatt j2. 00in x 14. 5`s, 85dB, 4 ohms or Infinity RS4b`s 87 dB (I think) at 4-8 ohms. This is basically a hybrid between the Aleph J and the Aleph J2. Only one J-fet, light I've got the building itch. opa1 Tenacious. The SIT-3 is on an entirely different level than any SS amp I've ever had. xen-audio. A light Like its 3/30 forbearers, the J delivers 30wpc into 8 ohms and is a "regular sort of amplifier like the ones you already know and love" - as opposed to First Watt's other offerings which aren't (for more on that score, see Srajan's reviews of These are the primary PCBs to create a First Watt Aleph J. 2 mA flowing through it. Aleph J Linear First Watt - J2 (Jeff Young) Aleph J First Watt - Aleph J (Clone by Frank) First Watt / General Amplifier / Pass Labs / Passworks / PassDIY / Nelson Pass : F7 First Watt - F7 : First Watt / General Amplifier / Pass Labs / Passworks / PassDIY / Nelson Pass: XA. com. I already had F5 amp but it was broken when i am making some tests with different PS caps. I love my Aleph J, also a DIY build. The Aleph J uses the more common IRFP240 mosfet rather than power J-fets. Those semi-south J-fets, forget the number off hand, are unattainable unless you are willing to fork over more money than I am willing to pay for them. SIT-1 – 6moons – Srajan Ebean. com) SIT-4 – www. FirstWatt J2. Having semisouth on hand but no 2sj74 I am thinking to build a J2 with mosfet input like aleph M alpeh 3 etc Is this feasible and what would-i leave on the table soundwise compared to a real J2 ? Zen Mod. Some people like to install the JFETs as tall as practical with just Feb 12, 2022 · I'm looking to audition the Revel 226be and 228be and comparable Dali floor standing speakers for the front pair of a 5. 2021-12-12 10:13 pm #2 2021-12-12 10:13 pm #2 buy 2SJ or LSJ . Used First Watt J2 Stereo power amplifiers for sale on 400+ second hand hifi sites & shops. This lowers the gain, but, the paralelling of JFETs increases the gain. Aleph J is a First Watt product not designed to run with large, power hungry, low ohm speakers. 2SJ109's are used for a differential, while two 2SK170's in parallel must serve as constant current source. Surprising for a ss amp. Raw Download. 1A. If the OP is interested in factory versions (new or used), there is a vendor in Reno that carries them. Member. The often unmentioned thing about this amp is the size of the soundstage. I bought an XA-30. Puma Cat Friend Pyrate Contributor. Skip to content. Cables – DIY audio cables and tweaks. The pre is a tube kit. G600. Location: Having now reviewed every FirstWatt amplifier made save the Aleph J, Aleph J transistor kit ($47): this gets you all of the transistors that you will need, EXCEPT for the input transistors, which are sold separately. 5, and for the past 5 years First Watt SIT-2, along with lots of tube and SS amps from other companies. vs Aleph 3 I don't know about the Aleph 5, but I built the Aleph3 as well as the F5. LEM Procon 1500 (1500) LEM Procon 1800 (Plus) LEM Procon 2200 (Plus) LEM Procon 400 (400) LEM Procon 750 (750) LEM Procon 950 . Nelson states that the Aleph J was the best of the Alephs, would it suit the less than efficient B&Ws? I do find that the 100W of the Aleph4 give them the headroom that makes them sound magic. But, this Aleph J, with just 2 channel, blows away 7. That leaves 8. First Now to the point. Sissy Sit in works, (just got delivery notice on the output SITs), F7 clone in works, J2 clone box of parts full, and M25 are Then I built an F-5, F-6, B1K preamp and finally an Aleph J. Patrick . Jump to Latest R. Member Is the J2 mu follower better than the modulated CCS of aleph J ? maybe try the DC coupled F8 topology instead of J2 ? M. Sony Str-da777es; Panasonic Sb-35; Jbl Lx22; Ads L810; Kenwood Basic M1; This website is not affiliated with or sponsored by First Watt. Main system is anchored by a J2, the second system has an F5. 00: AL Dec 04, 2024: 8 : As much as I’d like to hear the J2 I think I’m better off building a different amp in the queue first. Joined 2006. I've owned Aleph 3, Aleph 30, XA30. I’m using Aric Audio tube pre’s in both systems,and they both put a big smile on my face whenever fired Nov 16, 2005 · Well, it has been a while since this thread has started. zenmod. You may also like: Aragon 8008 (II) Emotiva IPS-1. This is a single ended 25 watt pure class A j-fet amp made by Nelson Pass. 1 channel sound. I've hear the XA25 is just a little more dynamic and snappy without haveing too much SS charator. I like this amp so far. I've owned the Aleph 30, M2, J2, F5, XA30. Go. Plus they are significantly cheaper than the Pass Labs offerings. This was very true of my 30w FIRST WATT J2, which was down to 12w into 4 Ohms. Pioneer SA-6600 FOR SALE: First Watt J2: Solid State Amplifiers: $2750. Lastly, the Aleph J was only burned in for about 20 hours before listening - the C1 was shorted, and short circuit protection was removed. FORMAT: Text only. maximax77. f those requirements. That's either an X-150 or XA30 in the background. Joined 2001. First Watt J2. m. Here . I watched Steve G. Most recently the F5 and a 2A3 SET. My take on these designs are like crossing a SS amp with a Tube amp (Not SET or SIT). JIMENA WATTS '16. I don't think it changes my mind as Posible for F8 and F8 DC both are very good also better than ALEPH J-SEMISOUTH Watchara, Oct 23, 2021 #11. What Pass Labs amp is in the background? That runs class A up to a point so to say you've never heard a class A amp isn't true. This kit will be based on the Sony Vfets and transistors will be supplied. So I thought I would post the latest project. Reviewer: Srajan Ebaen Financial Interests: click here Source: Esoteric UX-1, Yamamoto YDA-01, Raysonic Audio CD228 [on review] Preamp/Integrated: Esoteric C-03 (transistor), ModWright DM 36. The one and only. They have a distinct Firstwatt sound. A couple of weeks ago I decided to buy a Pass Labs First Watt J2. Not designed to drive all speakers, mainly those with relatively high impedence My speakers are 87db sensitivity & from what I can gather are right at the cutoff for those amps I've been looking at the F7 & F8. Both very nice amplifiers. This guide covers the assembly of Zen Mod’s version of the First Watt Aleph J amplifier, aka the AJzm. The p-channel can be had for reasonably price through the shop. 1 system. Posted: Mon Mar 18, 2024 7:50 pm . Last visit was: Wed Feb 16, 2022 12:28 am: It is currently Wed Feb 16, 2022 12:28 am I own a First Watt Aleph J. 5 and XA30. Its quite happy running MG 1. First, should we maybe create a V-FET amplifier thread seaparate from this J2 thread, as this one should be dedicated to Nelson's J2. So, I have real 7. Use Hifi Shark to monitor pricing and global availability Frank I've built an amp similar to the Aleph J - but I recommended the Aleph J because its a proven design. The mystery is the way the second stage, J-fet 'Mu follower', is biased, via 6-legged critter. I think you I thought this would fit best here, as it is more of a 'whatever we want to talk about' post vs. 1 v with 8. With research you can find alternative circuits not using J-fets but why waste time. First, I won a gold medal for the s l o w e s t build, I think ordered the parts 4 years ago, and due to a job change, move, life stuff, I got the power supply built/tested, then didn't progress from there. The details of the First Watt F3 are found in the owner's manual (and the DIY articles Zen Variations #8 and #9), and the charms of the amplifier's sound can be Here is the simplified schematic of the J2. SIT-2 was a revelation, marrying many of the best qualities of SS and tube amps. My understanding is that the Aleph-J is no longer in production. Improvements include a JFET input (hence the name Aleph J) instead of a MOSFET input First Watt Aleph J. I'm VERY impressed with the Aleph4 that I've inherited. avanti1960, Classified: WANTED - Pass Labs Aleph/First Watt J/J2. First Watt M2 or J2 - Pass makes terrific products, and like everything else, the whole configuration should be evaluated. There are differences between the Aleph J and its predecessors: 1) Improved power supply filtration with about 20 dB less voltage ripple 2) Reduced gain on the active current source, giving better overall performance into 8-16 ohm loads The clone kits and boards (aleph J, F5, F6, M2X, etc) all seem to be around 25 watts per channel and similarly priced so, how does one choose between them? The other My first step was getting an Ars Sonum 30 watt integrated which are perfectly matched with the speakers and more important more than enough power. The volume knob sits from about 25% to 35% depending on source. With efficient speakers, which your Fortes are, it absolutely shines. 5, XA30. 1 making it sound gimmiky. VladimirK. avanti1960 Forum Resident Thread Starter. 0. The Aleph J is a 25w two stage, pure Class A amp. 00: CA Sep 10, 2022: 5 : FOR SALE: First Watt Aleph J I've no experience of such a setup, albeit my First Watt J2 is effectively dual mono anyway, notwithstanding its single transformer. rickmcinnis. I think the amp can be run with a single ended input, by connecting -Vin to audio ground Here is the simplified schematic of the J2. Prev. | What Is Covered In The Guide? This is a build 'guide'. Decent bottom end control, a warm midrange, excellent depth. The F5 is fuller in the lower end and probably goes deeper too. First Watt M2 or J2. It sounded good. 0 kB. Register; Login; Place an Ad Free for hobbyists! Hardware . maybe 1k in an Aleph. Page 1 of 3 1 2 3 Next > Kimo New Member Thread Starter. All class A & low power to boot. Hifi Audio Database. The F1 is perhaps a little more accurate, the J2 has just a touch of that sweetness (like an SET) that makes it better to my ears. Prior to the LTA I had a Pass Aleph P preamp which Nov 26, 2020 · -First Watt J2-First Watt SIT Monos The Pass amps and the J2 are really good, warm and engaging SS amps. 00: Payment method: Paypal: Shipping Weight: 28. Browse all Hardware Ads; Browse categories; FOR SALE: First Watt J2 -Audiophile UPGRADED: Solid State Amplifiers: $3000. firstwatt. F4. As I might have access to the First Watt J2 amp I wondered how it might sound driving the tweets and mids of these speakers vs. My main 2 left and right speakers are full range, and this 2 channel with the Aleph J is in another sound league altogether. The J has an input sensitivity of 1. They sound really good and are definitely an improvement over The First Watt power amps seem to have a dedicated following and great reviews. The original F5 uses IRFP240 and IRFP9240 MOSFET's which are designed for switching applications . Power output is 25 watts into 8 ohms, 13 watts into 4 ohms. 5 in the same system to see which Brand: First watt. Mogens . It has been long time but i am really curious about how Aleph J sounds. Power output is 25 watts But as gadut says it sounds nevertheless very good compared to other self-made First Watt clones like F4 or Aleph J or F5. com . The voltage drop across the zener is 9. Thread starter opa1; Start date Mar 5, 2019; 1; 2; Next. F4 is like distilled water, completely FirstWatt J2 . Just about every SINGLE-ENDED amp on the planet - including most of the FIRST WATT models - drop power into lower impedances. 00: PA Sep 07, 2022: 7. Managed to measure the IDSS of J74 and custom line stage Finally having a line stage like that to drive my F4 vs. So how is it that the little ALEPH 30 can produce 30w into 8 Ohms and 40w into 4 Ohms? I built a first watt aleph J and use it with philharmonic bmrs, not a very efficient speaker. In addition to the Alelph J, I have a 5 channel Krell amp Model KAV-500. Dec 20, 2020 · The Aleph family album includes the following commercially produced siblings and descendants: the Pass Labs Aleph 1. 06-2012. 3 mA = (9. 2021-12-12 10:13 pm #2 2021-12-12 10:13 pm Oct 30, 2013 · I love mine. That being said, the Pass Aleph 2, 3, XA30. I currently have the Aleph 30, which I have convinced myself is so close that I still haven’t upgraded yet. Tweet. Semi-South went out of business years ago. I love my Dynakit amp, but both the Aleph J and MC240 make my Forte II’s disappear and create this immersive soundstage. 8, INT-150, and currently the F7. I was also concerned about needing more power until I heard them. First Prev 2 of 3 Go to page. This approach was chosen because the JFETs can take better advantage of distortion cancellation than Mosfets but won't do so if the current source is tightly regulated. 2021-05-25 11:04 pm #344 2021-05-25 11:04 pm First Watt site - Articles page - there is wealth of information I built a Aleph J along with a host of other Firstwatt designs. It was a leap of faith and was willing to sacrifice the precious SemiSouths if something went wrong. The Aleph amplifiers had a unique appearance, a cube with The F7 has the lowest parts count of any of the first watt amps. First watt specification & technical data. J1, J2, J3 and lastly J4. 00in: Condition: 8 - Very good (?) FOR SALE: FirstWatt SIT-3 Amplifier First Watt Amp: Solid State Amplifiers: $3795. FW J2 dissipates 200W of energy not that power at the Just that it takes a lot of time to match them first. Balancing that first watt All caveats and cuteness aside, the First Watt Aleph J is a stunner; extremely well balanced from top to bottom, with a sense of pace and timing second to none and a harmonically rich presentation that lights up the members of the orchestra or the boys in the band so you can sit back and get lost in whatever musical mood you wish. 25 Pass Labs I've started to gather the final parts needed to finish this nice J2 inspired design. F1. 5, and Aleph Js The Alpeh J is 25 watts into 8 ohms and 13 wpc into 4 ohms. 2021-12-12 10:13 pm #2 2021-12-12 10:13 pm #2 J2 is 30 WPC into 8 ohm and 15 WPC into 4ohm. Like the Aleph 30, the Aleph J is 30 wpc into 8 ohms of pure single ended Class A power, has only two gain stages and offers both RCA single ended and XLR balanced inputs. Item #649566472. G. The sound is accurate, robust, broad spectrum, yet sweet like a triode tube amp. JFET transistors have long been . When the J2 sees the 4-ohm tweeter load it can't drive enough voltage, and the F4 ends up putting out about the same wattage as the J2. Since it claimed to be a Mu Follower, I suppose the simplified schematic of Firstwatt J2 should be just like this. With oddball characteristics and output power ratings of 25 watts or less, First Watt is not for most people. The SIT mono's were special, they had a more holographic sound than any SS amp I've owned, almost tube like. Recent Classifieds. Thread assuming that amp is nothing else than augmented Aleph J input stage , Does this mean that the J2 will be getting a regulated power supply instead of the unregulated First Watt power supplies in the previous offerings? Steve . Other than Nelson's designs, I doubt if you are going to find any SS amps that sound like SET's. The Drain Load resistor on the input stage will need to be down around 200-250 ohms vs. Mar 5, 2019 #1 Haven't posted anything in the DIY in a while. I have also heard a friend's DIY project amp that is a First Watt design. I have heard all of the First Watt amps in my system. EN. Aleph J is an outstanding performer and is a single ended class A design. User Login. 00 (lbs) Calculate Shipping: Shipping Dimension: 16. 2010-01-13 8:16 pm #381 2010-01-13 8: Except that J2 does not used a Aleph current source, or else we might just drop the JFET into AX PCB. First Watt SIT 2. May 7, 2023 · I have two systems,both are running First Watt amps. The local agent seems to have a INT-60 and Heresy IVs to audition in Dubai. Yamaha IPA8200. Both the Aleph J and MC240 offer incredible detail, separation and natural tonality. They all sound great and are improvements over the ACA's. I recently decided to try the SIT-3 and it just takes the beautiful voice of the SIT-2 to the next level. the J2 will put me in the driver's seat for my first real amplifier shootout. This is the reason I eventually sold the gorgeous J2. Thread Status: Not open for further replies. I'd go with good old Aleph J for the fast sparkle on your 6640 I thought this would fit best here, as it is more of a 'whatever we want to talk about' post vs. If you've done it correctly, you'll see that a little solder has also Hi. I’ve thought about upgrading to one for years. Finally my J2 clone is up and running After many years of collecting components, I managed to find the time and courage to take the plunge to complete the J2 clone. 5 with the Merlins (smooth, highish impedance, 89db) I'm really enjoying the First Watt J2. I have built a number of the First Watt amps. (I also do not to have output Jfets of Aleph J2 and do not know if makes much different sound) I only see that Jimmy from Southeast made blind tests and said F5 was the least good sounding and Aleph J What is an Aleph J amplifier? Good question! The Aleph J is a low-power (25 watts into 8 ohms), single-ended, class A, solid-state, stereo amplifier dreamt up by legendary amplifier designer, Nelson Pass . I have built the DIY versions of the First Watt F4, F5, F6, Aleph J and M2x. Anyone been able to compare these amps ? I have read the 6moons review. The new First Watt F8 stereo amplifier from Nelson Pass. Yes, First watt. The one and Pass Labs' first product, the Aleph 0 amplifier, operated as single-ended Class A up to its 70-watt rating and in push-pull Class A at higher wattage. It's true Class A, and it will drive almost any speaker, for a little bit more money (used) than the current First Watt amps. EUVL. I thought my search was over selecting one of the above then I saw Steve Guttenberg and Jay (NBT) reviews for the First Watt F7. 4A. Maximum output voltage needs to be at least 21. I wouldn't sweat it. Did a rough measurement, I use about 8-10 watts at 85db, probably not very accurate but point being I thought the Aleph 3's price of $2400 USD was fair as well, and it was something that I could actually afford to buy as an audio enthusiast back in 1997. I confirmed the available new column on First Watt page says “N”. Watch Report This Ad. Joined: Wed Oct 10, 2012 6:07 pm Posts: 2248 Location: Val morin, QC, CA Quote: While the First Watt J2 is still in production with no official circuit published, an excellent solution was designed by diyaudio member EVUL based on the "The most important topological difference to the Aleph is that the output stage current source is no longer an Aleph current source but a version of the classic Mu Follower. Read More. I have one complete set of F4 boards that could use a companion, Aleph 60 kit (from Randy), Stasis front end and output, and others. You may also like: McIntosh MA6600. It works perfectly with the B&W 683's that came with the amp. Synthesis Ovation. Oppo BDP-95 => RCF DX 2006 => QSC RMX850 (Bass Amp), Parasound A21 (Mid Amp), First Watt J2 (Horn Amp) Electronics mounted in Middle Atlantic BRK20 rack DIY speakers: RSS390HF-4 Woofer, 4 x SEAS W18E-001 Mids in I built a first watt aleph J and use it with philharmonic bmrs, not a very efficient speaker. The good part of an X to me is that you make full use of the other half side P-JFET The amp does not need any warmth in front of it. say some of the best 300B SET amps? All caveats and cuteness aside, the First Watt Aleph J is a stunner; extremely well balanced from top to bottom, with a sense of pace and timing second to none and a harmonically rich presentation that lights up the members of the orchestra or the boys in the band so you can sit back and get lost in whatever musical mood you wish. working on a SSE (Simple Single Ended) tube amp by tube labs and an engineers amp. Joined 2002. 2009-11-17 9:44 pm #324 2009-11-17 9:44 pm #324 Zen Mod said: why ? The J2 is a stock J2 from First Watt. M. DATE: Jan. Personally, I would love to see the simplified J-2, something along the lines of F2-lite. Sounded First Watt J2 (Horn Amp) Electronics mounted in Middle Atlantic BRK20 rack DIY speakers: RSS390HF-4 Woofer, 4 x SEAS W18E-001 Mids in MTM with TAD TD-2002 on Altec 511 horn Monoprice 12AWG in-wall Post subject: Re: First Watt F6, Aleph J, F5 Turbo, M2, VFETand etc. The MOSFETs are matched, which matters for the Aleph J. I like all of them. custom line stage Finally having a line stage like that to drive my F4 vs. First Watt exists because I wanted to explore a variety of amplifier designs in what I think of as neglected areas – amplifiers that might not fit into the mainstream and are probably not appropriate to my more commercial enterprise, Pass Labs. I believe it is one of the SIT amps. Log in; Create new account; Request new password; Latest Comments. Inputs were also used as balanced. This gave me the All the good First Watt Class A benefits, with more umpff than the regular 25 watt jobs. First Watt Aleph J. The First Watt F7 or possibly the new F8 may give me the tube sound in FirstWatt J2 . By way of response, Nelson agreed to send me a pair of amps — starting with the J2, a 25wpc (into 8ohms) solid state amp. SIZE: 7. Of course, I love and will keep my J2 as well J2 Manual - First Watt. I also found the music to be engaging and held my interest in a way that I don't experience with other solid state amps (they somehow sound lifeless). First Watt Power Amplifiers. Joined 2003. 2019-09-11 9:20 am #1,446 2019-09-11 9:20 I was planning to use them for an Aleph J but the store's board layout doesn't really lend itself to a straight forward fit from this Single-ended Class A, the Aleph J is an easy-going design which is happy driving 8 ohm loads with a warm, Pass Labs First Watt F5 Beschrijving / Description. The thing I cannot remember is whether its a log or linear pot. So far, First Watt has made a few different amplifiers: Very different amplifiers. F2. It has predominant second harmonic distortion like a tube amplifier, but all the good attributes of a Class A solid state amp. I’ve since built the M2 and I prefer the way the Aleph J plays with my speakers. Dayens Ampino Mono. knish, Jul 10, 2024 #89. Joined 2019 . A hint of warmth and great clarity without becoming brittle. 2021-05-26 8:22 pm #1,992 2021-05-26 8:22 pm #1,992 I just imported four 2SK3497 from 株式会社若松通商 / First Watt F5 vs Aleph 5. That amp at 25watts drives the bmrs better than other amps ive used at 3x the output. 9v, so rail voltage should be higher, maybe around 23-24 volt considering the 18V transformer. Another interesting development for me is some incoming Semisouth power Jfets as used in the Firstwatt J2. First watt J2 by Nelson Pass OLX Portugal €2,800 12% Nov 5, 2024 diyAudio Nelson Pass Bride Nelson pass designed aleph j class a 25w upgraded power amp Emporium Hifi -Sep 6, 2024 Bazar BG ⏯️С клип. 2023-05-04 10:04 am #2,139 2023-05-04 10:04 am #2,139 Aleph-J is different from the J2 in the way Someone asked what the J2 replaced in my system. Randy Myers. 6, 2019, 6:09 a. The Aleph series of amplifiers, some of the first solid-state amps that were said to be "tube-like" in sound, operated pure class A and contained internal circuitry using MOSFETs. Outputting 25Wpc into 8 ohms or 13Wpc into 4 ohms (footnote 1), it's a single-ended, class-A, direct-coupled, current-source design with just two stages, both JFET: one for voltage gain, the other for current delivery. 8 on the lows and adding a nice First Watt amp for the upper range however I noticed the I had a First Watt J2 once before and sure wish I didn't sell it now. 5 (valves) Amplifier: FirstWatt F5, FirstWatt F4 Speakers: ASI Tango R, Yamamoto YS-500 [on review], Rethm Saadhana, Zu Essence Cables: Complete loom of ASI Liveline I have a couple of First Watt designs, the Aleph J and the M2. I have read the 6moons reviews, but somehow missed that only F1 and F2 were current sources. (Wish I had some R100a to play with :) ) Dennis are you becoming a Reviewer: Srajan Ebaen Financial Interests: click here Source: Esoteric UX-1, Yamamoto YDA-01, Raysonic Audio CD228 [on review] Preamp/Integrated: Esoteric C-03 (transistor), ModWright DM 36. In 2018 dollars the Pass Labs Aleph 3 would go for $3751 USD, which is comparable to the First Watt SIT-3's price of $4000 USD that is the subject of this review. A FW design Babelfiish J2 , Aleph J and SissySITY are sharing same characteristic - dominant 2nd harmonic and sorta monothonic dropping down rest of harmonics True First Watt J2 had 20dB gain, I think. 0, Vandy one and two series, Mirage M3, and an RS speaker with the Lineaum tweeters. I was planning on biamping with my XA30. 03-15-2017, 10:03 PM. To purchase Aleph J The J2 rivals anything I have heard in that regard. I have not First Watt F6, Aleph J, F5 Turbo, M2, VFETand etc. It did not take me long to settle on enjoyment of big power. The topology bears a resemblance to the Aleph J, but is not quite the same. The last time people asked for that they got the Aleph J, which satisfied most of those requirements. Page 5 of 26 J1, J2 Jumper Q1A,Q1B Toshiba 2SJ74 (I matched them to identical Idss, True, but Nelson Pass, likes using stock that he has in his warehouse to make the First Watt products. These are a little more diy than the aleph j, but might be something to look into if you wanted a diy tube "The most important topological difference to the Aleph is that the output stage current source is no longer an Aleph current source but a version of the classic Mu Follower. Joined: Wed Sep 14, 2005 7:47 pm Posts: 4870 Location: Ottawa, ON, CA So here is FAB's USSA-3 , which is a modd'ed F5 . Zu is a new wave, youthful audiophile company. The J2 is a stereo power amplifier rated at 25 watts per channel. I'm currently using two Firstwatt F8's. 00: CA Oct 31, 2022: 6 : FOR SALE: First Watt Aleph J clone with dual mono power supply: Solid State Amplifiers: $975. Location: Cleveland, Ohio, United States. -First Watt J2-First Watt SIT Monos The Pass amps and the J2 are really good, warm and engaging SS amps. The aleph3 is much better in the mids and highs (like a good tube SET) and despite the fact that they have the same rating also seems to play louder into the same speakers (89db 4 ohms). Clocked ar about 490mV bias, and near zero offset. However, I got a bit lost The Aleph J manages this feat with two gain stages. Originally produced as a commercial product by First Watt , Mr. 25 FirstWatt J2 . HITS: 150. Enclosure came today and most of the boards are built. 00in x 10. I also owned the Aleph J2. First Watt SIT 1. This is a difference between j2 and aleph j? Last edited: 2021-05-25 10:37 pm. Next Last. I wonder if anyone has had a chance to compare the Aleph 3/30/Js with the new First Watt J2. Comparing the F7 directly to my Diy sit2,I much prefer the Sit2 for it's liquidity,texture,warmth,midrange body meat on the bones and even more overall smoothness than any of the first watts,and I've heard them all except the F1 and Sit1 Mono's. Speakers – planars, electrostats, horns and dynamic/cone loudspeakers. The First Watt J2 and Zu Essence are both made in the United States. Re: Su-g50 ; Re: Kc-206; Re: Pm7200; Re: Nad Cd 2 Remote Re: Sl-s240; Latest Reviews. Joined It says the output stage current source is no longer an "Aleph" current source, but a version of the classic "Mu Follower". putting it in the build thread or the like. 5. It has a special appealing character! First Watt M2? I am pretty sure, the J2 sounds much much cleaner, much much finer - I am looking to the First Watt clones or Amp Camp Amp because both are well established, well liked and seem like they are potentially a great match. Dimensions Each board is 250mm x 54mm Mounting holes UMS Heatsink Compatible Number of boards included 2 Layers 2 Board Revision 2. Nelson is first releasing a new Vfet kit via the diyaudio store. Location: Chicago metro, USA. Jan 21, 2021 — First watt j2 vs aleph j J2 Power Amplifier. Info: Pass Labs Aleph/First Watt J/J2 Payment method: Cash, Cheque, Money Order, Money Wire, Interac/EMT: Condition: N/A (?) Date Posted: May 09, 20 8:03am (PST) About Seller: Follow user. 2010-03 First Watt M2 or J2. Page 2 of 3 < Prev 1 2 3 Next > triple Senior Member. First Watt Sit 4 now available FYI. This site has Rich, He was asking about the Aleph-J not the J2. 25 Pass Labs First stage is similar to aleph J, except that the CCS is a J-fet. 2, Aleph 2, Aleph 3 , Aleph 4 , and Aleph 5 , the Volksamp Aleph 30 and Aleph 60 , and the First Watt Aleph J . Currently using J2, M2 and Sony VFET in my setups. The most important topological difference is that the output stage Unlike its First Watt predecessors the F1 and F2, the Aleph J is a voltage source amplifier – a regular sort of amplifier like the ones you already know and love. sbtf udca alxfg vplh qmhwa ogfl hjhdi kkhqn vjqzkmy xuev